CN208966236U - A kind of pressure maintaining cylinder top seal structure with explosion prevention function - Google Patents
A kind of pressure maintaining cylinder top seal structure with explosion prevention function Download PDFInfo
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- CN208966236U CN208966236U CN201821302186.6U CN201821302186U CN208966236U CN 208966236 U CN208966236 U CN 208966236U CN 201821302186 U CN201821302186 U CN 201821302186U CN 208966236 U CN208966236 U CN 208966236U
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- interior bar
- core barrel
- wall
- pressure
- seal structure
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Abstract
The pressure maintaining cylinder top seal structure with explosion prevention function that the utility model relates to a kind of, including core barrel, interior bar and safety valve, the lower end of interior bar is put in core barrel, interior bar lower end is cooperated by sealing ring and the sealing of core barrel inner wall, forms liquid reservoir between the outer wall and core barrel inner wall of interior bar above sealing ring；Gas cavity, pressure release passage and fluid passage are equipped in interior bar, there is piston in gas cavity, fluid passage is connected to gas cavity, and pressure release passage is connected to liquid reservoir, the entrance of pressure release passage and the opening of fluid passage are set to the bottom surface of interior bar, and safety valve is set to the inlet of pressure release passage.In location of the coring procedure, if fluid pressure reaches predetermined value in core barrel, safety valve is opened, rock core liquid within the cartridge is discharged into liquid reservoir by pressure release passage, it is finally overflowed with the overfolw hole on core barrel top, the utility model has pressure compensation, and the timely pressure release of energy, the pressure in core barrel can be reduced rapidly, avoids pressure excessive and damages equipment.
Description
Technical field
The utility model relates to coring equipment technical field more particularly to a kind of pressure maintaining cylinder top with explosion prevention function are close
Seal structure.
Background technique
Core drilling be Solid Mineral geological prospecting frequently with exploration means.Tubular drill bit and drilling tool bottom hole circumferentially
Cyclic annular fractured rock retains a columnar rock core in bottom hole central part, and removal of core is to study geology and mine out of hole
The case where production, therefore referred to as core drilling.
Deep ground deep-sea area strata pressure is high, when carrying out core drilling, after guaranteeing that the rock sample got reaches ground
Still in hyperbaric environment, it need to store using pressure maintaining coring tube and transport sample.Pressure maintaining coring tube hangs in Shen Di coring area vertically, when
After rock sample enters pressure maintaining cylinder by lifting, the sealing of lower end is realized by valve, pressure maintaining cylinder upper end generally uses piston to seal, with
Guarantee hyperbaric environment in cylinder.
Deep ground blue water is usually with the presence of a large amount of fluids, therefore institute's packing pressure often exists in the form of hydraulic pressure.It is existing
The sealing of pressure maintaining cylinder upper end uses movement, and when drilling machine starts drilling operation, the cleaner for high-pressure drilling fluid being passed through can be under core barrel
End enters inside core barrel, increases core barrel internal pressure, and piston sealing structure pressure regulation ability is limited, if in core barrel
Pressure is excessive, is easily damaged equipment.
Utility model content
The utility model is intended to provide a kind of pressure maintaining cylinder top seal structure with explosion prevention function, is provided with pressure release passage
And safety valve, when cylinder pressure reaches predetermined value, safety valve is opened, can timely pressure release, and pressure relief capability is strong, can effectively protect
Core drilling is demonstrate,proved to carry out safely.
In order to achieve the above objectives, the technical solution adopted in the utility model is as follows:
A kind of pressure maintaining cylinder top seal structure with explosion prevention function, including core barrel, interior bar and safety valve, the interior bar
Lower end put in core barrel, interior bar bottom is expanded, and the outer wall of interior bar bulb is equipped with sealing ring one, sealing ring one and core barrel
Inner wall sealing cooperation, forms liquid reservoir one, core barrel top between the outer wall and core barrel inner wall of one top interior bar of sealing ring
Side wall is equipped with overflow hole；
Gas cavity, pressure release passage and fluid passage are equipped in interior bar, the outlet of pressure release passage is connected to liquid reservoir one,
The entrance of pressure release passage is located at interior bar bottom surface, and safety valve is set to the inlet of pressure release passage；Piston two, liquid are equipped in gas cavity
Body channel upper end is connected to gas cavity, and the lower ending opening of fluid passage is in the bottom surface of interior bar.
Further, interior bar outer wall is equipped with sealing ring two, and sealing ring two is located at outlet and the sealing ring one of pressure release passage
Between；When interior bar is moved to top dead centre relative to core barrel, sealing ring two and the sealing of core barrel inner wall cooperate, and overflow hole is located at
Between sealing ring two and sealing ring one.
Further, interior bar lower end is set with end cap cap, and the region between end cap cap inner wall and interior bar bottom surface constitutes liquid
Cavity two.
Preferably, strainer is housed in liquid reservoir two.
It further, further include the piston one being adapted to core barrel inner wall, piston one is equipped with liquid flow through-hole, piston one
It is mounted on end cap cap by bolt, the position that end cap cap corresponds to liquid flow through-hole is equipped with through-hole.
Wherein, liquid flow through-hole eccentric setting.
Further, two are had on piston one, two pistons one are affixed, and the liquid flow through-hole on two pistons one is just
It is right.
Wherein, O-ring is installed on piston one.
Wherein, interior bar lower outside wall has limited step one, and the core barrel upper inner wall has suitable with limited step one
The limited step two matched.
Further, limited step two is located above overflow hole.
Compared with prior art, the utility model has the following beneficial effects:
1. the utility model is in location of the coring procedure, if fluid pressure is excessive in core barrel, when reaching predetermined value, and safety valve
It will open, rock core liquid within the cartridge will enter the appearance of the liquid between interior bar and core barrel along the liquid flow through-hole on piston one
It in chamber one, and is overflowed with the overfolw hole on core barrel top, carries out pressure release in time, reduce rapidly the pressure in core barrel, avoid pressing
Power is excessive and damages equipment；
2. the utility model can carry out pressure compensation to core barrel, maintain core barrel automatically by gas cavity and piston
Interior pressure is stablized, and realizes pressure maintaining coring.
Detailed description of the invention
The schematic diagram of the utility model before Fig. 1 is coring；
Fig. 2 is the enlarged drawing in Fig. 1 at A；
Schematic diagram of the utility model in drilling machine outer cylinder before Fig. 3 is coring；
Fig. 4 is the enlarged drawing in Fig. 3 at A；
Fig. 5 is the enlarged drawing in Fig. 3 at B；
Schematic diagram of the utility model in drilling machine outer cylinder when Fig. 6 is coring；
Fig. 7 is the enlarged drawing in Fig. 6 at A；
Fig. 8 is schematic diagram of the utility model in drilling machine outer cylinder after the completion of coring；
Fig. 9 is the enlarged drawing in Fig. 8 at A；
In figure: 1- core barrel, 2- interior bar, 3- safety valve, 4- piston one, 5- liquid reservoir one, 6- pressure release passage, 7- liquid
Cavity two, 8- strainer, 9- end cap cap, 10- gas cavity, 11- piston two, 12- sealing ring one, 13- overflow hole, 14- liquid are logical
Road, 15- liquid flow through-hole, 16- drilling machine outer cylinder, 17- drill bit, 18- valve, 19-O type circle, 20- sealing ring two, 21- limited step
One, 22- limited step two.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing, to this reality
It is further elaborated with novel.
As shown in figs 1-9, a kind of pressure maintaining cylinder top seal structure with explosion prevention function disclosed by the utility model, including
Core barrel 1, interior bar 2 and safety valve 3, the lower end of interior bar 2 are put in core barrel 1, and 2 bottom of interior bar is expanded, outside 2 bulb of interior bar
Wall be equipped with sealing ring 1, sealing ring 1 and 1 inner wall of core barrel sealing cooperate, the outer wall of one 12 top interior bar 2 of sealing ring with
Liquid reservoir 1 is formed between 1 inner wall of core barrel, 1 upper portion side wall of core barrel is equipped with overflow hole 13.
Gas cavity 10, pressure release passage 6 and fluid passage 14, the outlet and liquid reservoir of pressure release passage 6 are equipped in interior bar 2
One 5 connections, the entrance of pressure release passage 6 are located at 2 bottom surface of interior bar, and safety valve 3 is set to the inlet of pressure release passage 6；Gas cavity 10
In be equipped with piston 2 11,14 upper end of fluid passage is connected to gas cavity 10, and the lower ending opening of fluid passage 14 is in the bottom of interior bar 2
Face, piston 2 11 pass through the movement of piston 2 11 for completely cutting off gas-liquid, the pressure in adjustable core barrel 1.Another
Gas cavity 10 is connected with gas charge and discharge device in a embodiment, convenient for 10 inflation/deflation of gas cavity.
2 outer wall of interior bar is equipped with sealing ring 2 20, sealing ring 2 20 be located at pressure release passage 6 outlet and sealing ring 1 it
Between.2 lower end of interior bar is set with end cap cap 9, and the region between 2 bottom surface of 9 inner wall of end cap cap and interior bar constitutes liquid reservoir 27, gas
Body cavity 10 is connected to by fluid passage 14 with liquid reservoir 27, and pressure release passage 6 is separated with liquid reservoir 27 by safety valve.Liquid
Strainer 8 is housed in body cavity 27, impurity can be filtered out, impurity is avoided to enter in gas cavity 10.
9 lower end of end cap cap is equipped with the piston 1 being adapted to 1 inner wall of core barrel, and piston 1 is mounted on end cap by bolt
On cap 9, piston 1 is equipped with liquid flow through-hole 15, and the position of the corresponding liquid flow through-hole 15 of end cap cap 9 is equipped with through-hole.Liquid flow
15 eccentric setting of through-hole is equipped with O-ring 19 on piston 1.
Two are had on piston 1 in another embodiment, two pistons 1 are affixed, on two pistons 1
15 face of liquid flow through-hole is equipped with O-ring 19 on underlying piston 1.
It is equipped with limited step 1 in 2 lower outside wall of interior bar, 1 upper inner wall of core barrel has suitable with limited step 1
The limited step 2 22 matched, limited step 2 22 are located at 13 top of overflow hole.
As shown in Figs. 1-5, before core work starts, 1 lower end of core barrel extends to the bottom of drilling machine outer cylinder 16, outside drilling machine
Cylinder 16 lower ends install drill bit 17, the lower end of interior bar 2 extend to brill 17 in, with drilling machine transfer and run, core barrel 1 with drilling machine outside
Cylinder 16 moves down, and drilling fluid is gradually filled into core barrel 1, during this, if the pressure in core barrel 1 is greater than gas cavity
The intracorporal pressure of 10 upper chambers, partially liq enters liquid reservoir 27 through liquid flow through-hole 15, followed by strainer 8 and liquid
Body channel 14 enters in gas cavity 10, and compression piston 2 11 is until gas-liquid reaches balance.If pressure reaches predetermined value, peace
Full valve 3 is then opened, and liquid enters in liquid reservoir 1 through pressure release passage 6, eventually by the overflow hole 13 on 1 top of core barrel
Core barrel 1 is discharged, avoidable 1 pressure of core barrel is excessive, the training equipments such as protection drilling machine.
As shown in Figure 6,7, when limited step 1 and limited step 2 22 offset, core barrel 1 and interior bar 2 cannot axis again
To relative movement, interior bar 2 is moved to top dead centre relative to core barrel 1, and sealing ring 2 20 is matched with the sealing of 1 inner wall of core barrel at this time
It closes, overflow hole 13 is between sealing ring 2 20 and sealing ring 1.It lifts interior bar 2 upwards at this time, core barrel 1 can be driven together
Uplink.As shown in Figure 8,9, after core barrel 1 crosses valve 18 by lifting, valve 18 is closed, and realizes the sealing of pressure maintaining cylinder lower end,
Guarantee hyperbaric environment in cylinder.
In drilling process, pressure reduction in core barrel 1,2 11 following pressure of piston is reduced, and balance is broken, gas cavity
Gas expansion in 10, piston 2 11 move down, and compress liquid in core barrel 1, reach balance again.
The utility model advantages of simple, pressure compensation high sensitivity, pressure maintaining intensity are high, have explosion prevention function, good reliability.
Certainly, the utility model can also have other numerous embodiments, without departing substantially from the spirit of the present invention and its essence
In the case where, those skilled in the art can make various corresponding changes and modifications, but these according to the utility model
Corresponding changes and modifications all should belong to the protection scope of the utility model the attached claims.
Claims (10)
1. a kind of pressure maintaining cylinder top seal structure with explosion prevention function, it is characterised in that: including core barrel (1), interior bar (2) and
Safety valve (3), the lower end of the interior bar (2) are put in core barrel (1), and interior bar (2) bottom is expanded, outside interior bar (2) bulb
Wall is equipped with sealing ring one (12), and sealing ring one (12) and the sealing of core barrel (1) inner wall cooperate, interior bar above sealing ring one (12)
(2) liquid reservoir one (5) are formed between outer wall and core barrel (1) inner wall, core barrel (1) upper portion side wall is equipped with overflow hole
(13)；
Gas cavity (10), pressure release passage (6) and fluid passage (14), the outlet of pressure release passage (6) and liquid are equipped in interior bar (2)
Body cavity one (5) connection, the entrance of pressure release passage (6) are located at interior bar (2) bottom surface, and safety valve (3) is set to entering for pressure release passage (6)
At mouthful；Piston two (11) is equipped in gas cavity (10), fluid passage (14) upper end is connected to gas cavity (10), fluid passage
(14) lower ending opening is in the bottom surface of interior bar (2).
2. pressure maintaining cylinder top seal structure according to claim 1, it is characterised in that: interior bar (2) outer wall is equipped with sealing
Two (20) are enclosed, sealing ring two (20) is located between the outlet and sealing ring one (12) of pressure release passage (6)；When interior bar (2) relative to
When core barrel (1) is moved to top dead centre, sealing ring two (20) and the sealing of core barrel (1) inner wall cooperate, and overflow hole (13) is located at close
Between seal two (20) and sealing ring one (12).
3. pressure maintaining cylinder top seal structure according to claim 1 or 2, it is characterised in that: interior bar (2) lower end is set with end
Nut cap (9), the region between end cap cap (9) inner wall and interior bar (2) bottom surface constitute liquid reservoir two (7).
4. pressure maintaining cylinder top seal structure according to claim 3, it is characterised in that: equipped with filter in liquid reservoir two (7)
Net (8).
5. pressure maintaining cylinder top seal structure according to claim 3, it is characterised in that: further include and core barrel (1) inner wall
The piston one (4) of adaptation, piston one (4) are equipped with liquid flow through-hole (15), and piston one (4) is mounted on end cap cap by bolt
(9) on, the position of end cap cap (9) corresponding liquid flow through-hole (15) is equipped with through-hole.
6. pressure maintaining cylinder top seal structure according to claim 5, it is characterised in that: liquid flow through-hole (15) bias is set
It sets.
7. pressure maintaining cylinder top seal structure according to claim 5 or 6, it is characterised in that: have two on piston one (4)
A, two pistons one (4) are affixed, liquid flow through-hole (15) face on two pistons one (4).
8. pressure maintaining cylinder top seal structure according to claim 5 or 6, it is characterised in that: be equipped with O on piston one (4)
Type circle (19).
9. pressure maintaining cylinder top seal structure according to claim 1 or 2, it is characterised in that: interior bar (2) lower outside wall has
Limited step one (21), core barrel (1) the upper inner wall have the limited step two (22) being adapted to limited step one (21).
10. pressure maintaining cylinder top seal structure according to claim 9, it is characterised in that: limited step two (22), which is located at, to overflow
Above discharge orifice (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821302186.6U CN208966236U (en) | 2018-08-13 | 2018-08-13 | A kind of pressure maintaining cylinder top seal structure with explosion prevention function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821302186.6U CN208966236U (en) | 2018-08-13 | 2018-08-13 | A kind of pressure maintaining cylinder top seal structure with explosion prevention function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208966236U true CN208966236U (en) | 2019-06-11 |
Family
ID=66753951
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821302186.6U Withdrawn - After Issue CN208966236U (en) | 2018-08-13 | 2018-08-13 | A kind of pressure maintaining cylinder top seal structure with explosion prevention function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208966236U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108999583A (en) * | 2018-08-13 | 2018-12-14 | 四川大学 | Pressure maintaining cylinder top seal structure with explosion prevention function |
-
2018
- 2018-08-13 CN CN201821302186.6U patent/CN208966236U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108999583A (en) * | 2018-08-13 | 2018-12-14 | 四川大学 | Pressure maintaining cylinder top seal structure with explosion prevention function |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20190611 Effective date of abandoning: 20230630 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20190611 Effective date of abandoning: 20230630 |